Kenny, here's some pics to help you out. This loader has lifted over 1000 lb on many occasions. The loader arms and cylinders are original. I fabbed everything else 30 years ago. Posts are 2x4x1/8 tube as is the diagonal bracing. Stress points are gusseted by 1/4" plate.
Sub frame to rear axle connection. The sub frame is 2x3x1/8 tube.
Look closely and you can see the front of the sub frame (3/8" plate) and the side mounts for the diagonal bracing 1/4x2" (flat stock). The cross bar supporting the posts is 2x2x1/4" tube that the posts slide onto and is welded and gusseted to the sub frame.
The front of the U shaped diagonal bracing has been painted red so it's a bit hard to differentiate from the MF1655.You can just see the 2 bolts holding it on above the front tube with the arc cut in it.
Left front corner of the same part of the U shaped bracing. The 1" square tube is a guard for the front PTO.
Post to diagonal bracing attachment, right side.
The buckets that fit this loader compared to the one on my SCUT. Left is a 12 trenching bucket that will dig a 34" deep trench, next is the rusty original 40" bucket, and the yellow one is a home made, scaled up 54" copy of the original that weighs 210 lb.
Side view perspective of the 3 materials buckets.
Note: There were no holes drilled in the frame to mount this loader. Only existing holes were used. Remove the loader and the tractor frame is factory original.
You will also note that the rear sub frame ends very close to the front axle support structure which carries ALL of the high stress loading. The rear of the sub frame mounts to the axle and does all of the pushing as well as lifting the rear end to counter payload. This tractor carries 400 lb of ballast at all times and an implement, up to 385 lb, on the 3PH when more ballast is required.
In 2200 hours of heavy use, there have been zero structural failures on the parts that I have fabbed. There has been one failure of a redundant mount. Vibration broke the weld on the pin meant to add an extra level of security to the post to crossbar connection.
For reference, the arms are 65.5" post pin to bucket pin and are past due for replacement. Maybe next year.
The two gallons of fluid in the posts does not get hot. There is enough cooling surface between the posts, cylinders, and plumbing, coupled with the wait time between lifts due to travelling, to keep the fluid temperature within reason. Heavy wall tubing does not radiate heat as quickly as lighter wall.
Edited by TUDOR, February 04, 2015 - 05:18 AM.